Food & Agr. Code, § 32909

It is unlawful for any person to produce, manufacture, prepare for sale, or sell any of the following:

(a) Any milk, cream, or other product of milk to which has been added, or that contains, any compound of boron, salicylic acid, formaldehyde, or other preservative.

(b) Any milk or product of milk, except as otherwise provided in this division, to which has been added any coloring matter or any gelatin or other substance.

(c) This section does not prohibit the use of harmless coloring matter and common salt (chloride of sodium) in butter and cheese, the use of gelatin, sweetening, eggs or egg products, harmless coloring or flavoring, or edible stabilizer in the manufacture of ice cream, ice milk, sherbet, or edible stabilizer or citric acid in the creaming mixture for cottage cheese, or lowfat cottage cheese, or the use of alkalies approved by the director, in the manufacture of butter, or the adjustment of the acidity of ice cream mix within the limits designated by the director.

(d) Mixed tocopherols (vitamin E) or ascorbic palmitate (vitamin C), as approved by the director, may be added to UHT cream, UHT whipped cream, UHT cream topping, whipped cream, or cream topping, and buttermilk to protect and enhance the flavor of these products.